Electric locomotive



N5 Model.)

P 0 AU m nu M T O B L E IJV'VEJV'TOR Attorney .6

WITNESSES we NBRRIS' PETERS co, mmo-umo, WASHINGTON, D. 1:.

UNITED STATES PATENT OFFICE.

JOSHUA GRAY, OF MEDFORD, MASSACHUSETTS.

ELECTR IC LOCOMOTlVE.

SPECIFICATION forming part of Letters Patent No. 478,591, dated July 12,1892.

Application filed June 12, 1891. Serial No. 396.022- (No model.) A

To all whom it may concern.-

Be it known that I, JOSHUA GRAY, a citizen of the United States,residing in Medford, Middlesex county, Massachusetts, have in- 5 ventedcertain new and useful Improvements in Electric Locomotives, of whichthe following is a specification.

My invention relates to electric'loco motives,

and has for its object to improve the construction and arrangement ofthe operating devices of said locomotives and to providemeans forincreasing the traction between the locomotive and the truck whendesired.

To these ends my invention consists in a I construction and arrangementof devices, substantially as hereinafter specified.

In the accompanying drawings, Figure 1 is an end view, partly insection, of an electric locomotive embodying my invention. Fig. 2

is a side view, also partly in section.

a I have shown my invention as applied to a motor-car, adapted moreespecially to sustain the motor and to be connected with any suitablepassenger or'other car, although it is evi- 2 5 dent that my inventioncan with equal propriety be applied to one or both ends of an ordinarypassenger-car.

In the drawings, A represents the body of the car, which may be of anydesired form 0 and construction, and I have shown it in this instancemounted upon a single truck B, although, of course, if the body of thecar is made longer it may be mounted upon two trucks or the wheels andconnections may be otherwise arranged.

Extending from the forward axle C is a vertical bolt or bearing D, theupper end of which passes through a bearing in the floor of the,

car. The axle C may be supported in the 40 usual hangers from thecar-body. In this way the greater portion of the weight of the motor-carand the motor is caused to be supported upon the forward axle, whichtends to increase its traction, and the rear wheels of 5 the truck actas guide-wheels, as well as assist in supporting the body of themotor-car. Heretofore in electric railroading it has been general toapply the motor to the truck,

it being common to support the motor on the truck-frame and connect itdirectly with the axle or wheels of the trucks. The motor being thusmounted, its comparatively delicate mechanism is exposed more or less tothe elements, such as dust and water, and it is difficult to protect themotor when in this position from damage or destruction from these orother causes. Moreover, it is diflicult to get access to the motor forpurposes of repair or adjusting the parts. In order to overcome theseobjections, I mount the motor on the upper portion of the car-body, andin the present instance I have shown it supported upon the frame A, itbeing inclosed by a suitable case or protector A Thus E represents thefield-magnet of the motor, and F the armature thereof, the latter beingarranged vertically and being connected, preferably bya universal orflexible joint or coupling g, with the vertical shaft G, passing throughthe car and running in bearings g in the car-floor. In this way it willbe seen that the motor is in a position to be readily accessible and caneasily be protected from the deteriorating effects of the elements, andits weight is supported by the forward wheels of the trucks. The motormay be mounted so that the shaft extends down through the car at oneside, as shown in Fig. 1, or it may be in the middle or in any otherconvenient place.

Mounted on the lower end of the shaft Gris a broad gear-wheel H, itbeing preferably made broad, so as to allow for a vertical movement ofthe truck-frame and car-body and still retain its connection with thegear-Wheel I, .which is mounted on the king-bolt over the axle.Connected to this gear-wheel I is the bevel-wheel J meshing with thebevel-Wheel K, fixed on the axle, and it will thus be seen that therotation of the armature of the motor is transmitted directly throughthis system of gearing to the forward axle of the motor-car.

I have not shown herein the means for regulating the circuit of themotor, as these form no part of my invention, the motor being intendedto be used in connection with any ordinary system, either of the singleor double overhead or underground or even with secondary batteries, andof course the circuit connections will be arranged in a well-knownmanner to suit the requirements of any particular case.

In order to protect the gearing from dust or other dangerous elements, Isurround the x whole with a casing L of any suitable material. It oftenhappens that in mounting grades or with a heavy load the traction of themotor-car is not sufficient, and in order to increase this traction Iprovide the hubs N of the wheels M of iron and surround them withnumerous coils of wire, one terminal of each coil being connected to thewheels and the other terminals of each coil being connected to disks orplates 0, insulated from the axle and from the hubs, and I provide abranch circuit having connection with the brushes P, bearing on saidplates. In the instance shown in the drawings the current from thearmature F of the motor passes by a conductor Q directly to the wheelsof the truck and thence to the rails forming the return-circuit.Connected to this conductor Q is a switch-arm R, by means of which thebranch-circuit wires P may be connected with the circuit Q, so that partof the return circuit will pass through the brushes P and thence to thecoils N on the hubs of the wheels and magnetize the wheels, so that theyhave an attraction for the rails, and I preferably so Wind the coils onthe hub that the wheels of each side shall be of opposite magnetism. Ofcourse A if the circuit is taken from a double trolleywire overheadinstead of being completed near the end thereof, of a bevel-gear mountedon the car-axle, a vertical bearing extending from the axle, abevel-gear mounted thereon and engaging the bevel-gear on the car-axle,a spur-gear also mounted on the vertical bearing, a pinion engaging thespur-wheel, and a vertical shaft extending to the top of the car, and amotor mounted on the front end of the car and connected to said verticalshaft, sub stantially as described.

2. The combination, with'an axle of a car, of a bolt or bearingextending vertically from the axle, a bevel-gear mounted on the axle, abevel-pinion mounted on the bolt, a gearwheel also mounted on the bolt,an electric motor mounted on the top portion of the car, and a verticalshaft connecting the armature of the motor with the gear-wheel on thebolt, substantially as described.

3. The combination, with the forward axle of a car, of a Vertical boltmounted -on the axle and having a bearing on the floor of the car, abevel-gear connected to the axle, a bevelpinion on the bolt, a gear alsomounted on the bolt, an electric motor mounted on the car above theforward axle, and a vertical shaft connected to the armature by aflexible joint and'having a broad pinion on its lower end engaging saidgear-wheel, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOSHUA GRAY.

Witnesses:

WILLIAM E. RooERs, JOHN B. MORAN.

